VerCure is a spell that is used either for solo content, or for Dual casting when a boss becomes untargetable. Nothing else really.
In optimized gameplay, you won't sacrifice a DPS GCD for a weak heal outside of horrible emergency. We should not get too much on the "hybrid" nature of RDM, it has been sacrificed and now RDM is a pure DPS job. The opportunities of DPS or buffing actions traded in 70-80 for unbalanced healing in the sake of hybrid would kill the job for me.
Unless the game changes fundamentally, two healers (and a few oGCD abilityes like Mantra, Second Wind, Mana Ward) are more than enough to cope with the raid damage.